BANGOR, Maine — A detective with the Bangor Police Department was issued a summons last week for operating under the influence, Penobscot County District Attorney R. Christopher Almy confirmed Thursday.

Detective Erik Tall was on duty when the incident occurred, Almy said. He said that a criminal complaint was being prepared but that he did not believe it had been presented to Tall as of late Thursday afternoon.

Few details about the alleged drunken driving incident were available late Thursday afternoon. Tall could not immediately be reached for comment.

Lt. Mark Hathaway, the city’s interim police chief, referred questions about the incident to the city manager’s office.

City Manager Cathy Conlow confirmed that a Police Department employee has been placed on unpaid leave pending the outcome of an external investigation into the employee’s alleged misconduct.

She declined to name the employee involved, characterizing the matter as personnel-related and citing her legal obligation to keep aspects of the investigation confidential. She said the investigation would take “at least a couple of weeks.”

She also declined to disclose who was conducting the external investigation, but did say it was not the Maine State Police.

Conlow did, however, release the following statement.

“On Oct. 3, an issue with an employee of the police department was brought to the attention of the acting police chief,” she said. “He immediately took all of the actions to make sure that the matter was handled in an appropriate manner. He came in and took the steps necessary to protect the rights of the employee, the needs of the public and the needs of the [police] department.”